Both right and left ear can be comfortably worn The headset fits perfectly in your ear easily to keep your conversations private Suitable for use in nighubs, bars, security, restaurants, hotels, airports, casinos, plant manufacturing, conferences, concerts, warehouses, and noisy environments Standard two-pin diameter: 3.5mm stereo (upper pin), 2.5mm stereo microphone (bottom pin) Two-pin spacing: 11mm Compatible with KPG series: KPG27D, KPG29D, KPG48D, KPG49, KPG55D, KPG56D, KPG62D, KPG66D, KPG69D, KPG70D, KPG74D, KPG75D, KPG77D, KPG82D, KPG87D Compatible with TK series: TK-208, TK-220, TK-320, TK-240, TK-340, TK-240D, TK-340D, TK-248, TK-348, TK-250, TK-350, TK-353, TK-260, TK-360, TK-260G, TK-360G, TK-270, TK-370, TK-270G, TK-370G, TK-272G, TK-372G, TK-373G, TK-278G, TK-378G, TK-388G, Pro-Talk, TK-430, TK-431, TK-2100, TK-3100, Pro-Talk, TK-2102, TK-3102, Pro-power, TK-2107, TK-3107, pro-talk, TK2207, TK3207, TK-2160, TK-3160 Material: ABS Color: black Package Contents: 1 x Earpiece Headset Only the above package content, other products are not included Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm